analysis of coal,proximate analysis of coal

the ppt explains about analysis of coal

1. ANALYSIS OF COAL SAYYAD MOULALI 2201520044, Msc Analytical chemistry, KL UNIVERSITY,GUNTUR . 1

2. There are two methods for analyzing coal: Ultimate analysis and Proximate analysis . coal Analysis Ultimate Analysis Proximate Analysis 2 ANALYSIS OF COAL

3. PROXIMATE ANALYSIS Four parameters which have been analysed under this particular method as, moisture content, volatile matter, ash content, fixed carbon. 3

4. 4 MOISTURE ANALYSIS Take a representative sample of finely powdered coal Place the sample in a silica crucible Heat the crucible in an electrical hot air oven at a temperature of approximately 105-110°C Weigh the crucible with the remaining coal Repeat the heating and cooling process until the weight of the crucible with the coal remains constant Calculate the loss in weight as a percentage of the initial weight of the coal sample . The formula for calculating moisture content is as follows: Moisture (%) = (loss in weight due to moisture removal / weight of coal sample taken) x 100.

5. DETERMINATION OF VOLATILE MATTER Obtain a sample of  moisture-free coal Preheat a  muffle furnace  to a specific temperature of  925°C ± 20°C . Heat the sample for a duration of  7 minutes . Weigh the crucible again after cooling This weight loss represents the  volatile matter  content in the coal. This is calculated using the formula : Volatile matter (%) = (loss in weight due to removal of volatile matter / weight of coal sample used) x 100. 5

6. Determination of Ash content Obtain a sample of  dry coal . Place the coal sample in an  open crucible heat the sample for a duration of  thirty minutes .at temperature range of  700-750°C . Calculate the percentage of ash content based on the weight of the residue. Lower ash content indicates  higher coal quality . The ash content is calculated using the Formula: Ash content (%) = (weight of ash formed / weight of dry coal taken) x 100. 6

7. Fixed Carbon Once the moisture, volatile matter, and ash content have been determined, the remaining substance is referred to as fixed carbon . Formula:- Fixed carbon % = 100-(moisture%+VM %+Ash %) 7

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